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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0897832 (1978-04-19) |
발명자 / 주소 |
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인용정보 | 피인용 횟수 : 42 인용 특허 : 2 |
A method for extracting an underground mineral such as coal, which avoids the need for sending personnel underground and which enables the mining of steeply pitched seams of the mineral. The method includes the use of a narrow vehicle which moves underground along the mineral seam and which is conne
A method for extracting a mineral from the ground comprising: applying a stream of liquid under pressure through a conduit having a nozzle directed at the mineral; and introducing a material to flow with said stream in said conduit and out through said nozzle, which is liquid under the pressure of s
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